138239622 has 40 divisors (see below), whose sum is σ = 318144816. Its totient is φ = 44832528.

The previous prime is 138239617. The next prime is 138239639. The reversal of 138239622 is 226932831.

138239622 is a `hidden beast` number, since 1 + 3 + 8 + 23 + 9 + 622 = 666.

138239622 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×138239622² = 38220386181405768, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5538 + ... + 17525.

Almost surely, 2^138239622 is an apocalyptic number.

138239622 is an abundant number, since it is smaller than the sum of its proper divisors (179905194).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138239622 is a wasteful number, since it uses less digits than its factorization.

138239622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23114 (or 23105 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 138239622 is about 11757.5346905718. The cubic root of 138239622 is about 517.0638543246.

The spelling of 138239622 in words is "one hundred thirty-eight million, two hundred thirty-nine thousand, six hundred twenty-two".